21310102433 has 4 divisors (see below), whose sum is σ = 21310427028. Its totient is φ = 21309777840.

The previous prime is 21310102421. The next prime is 21310102481. The reversal of 21310102433 is 33420101312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19739407009 + 1570695424 = 140497^2 + 39632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21310102433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21310102493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25238 + ... + 207983.

It is an arithmetic number, because the mean of its divisors is an integer number (5327606757).

Almost surely, 2^21310102433 is an apocalyptic number.

It is an amenable number.

21310102433 is a deficient number, since it is larger than the sum of its proper divisors (324595).

21310102433 is an equidigital number, since it uses as much as digits as its factorization.

21310102433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324594.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21310102433 its reverse (33420101312), we get a palindrome (54730203745).

The spelling of 21310102433 in words is "twenty-one billion, three hundred ten million, one hundred two thousand, four hundred thirty-three".